Trailberg Sierra Sling Bag in Black. Sling your hook in style thanks to Trailberg and this durable and practical bag that’s simply custom-made for adventure. Made from tough ripstop fabric that takes the everyday rough and tumble of commuting, hiking and travelling in its stride, the main top zip fastening compartment is spacious enough to fit in all your essentials for easy at-hand access. With additional front and side zip pouches, zip pocket and D ring attachment to sling shoulder strap, front elasticated bungee storage with reflective tabs, and reflective Trailberg logo to front to ensure you stay safely visible in poorly lit areas.